Typewriting machine



1944. w. F. HELMOND 2,366,106

TYPEWRI'ITING MACHINE Filed Dec. 5', 1941' W/LL/A/V E HEZ/VO/VD I BY K INVENTOR ATTORNEY Patented Dec. 26, 1944 s UNITED S E FrnrEwmrmGMAonmE William "FifHelmond, Clinton,Conn., assignor to Underwood Elliott Fisher Company, *NewY-ork, :'N.Y.,' a corporationbf Delaware i ApplicationiDecember 3, 1941, .S a1 1 0, 21,405

,rec aims:@(ol; 197 :1 86) This invention relates ltortypewritingmmachines and, more particularlictolcomposite masking structures for such machinesgor portions thereof.

Although composite masks are wellknown in the art, their construction isusually such,,that it is :awkward or inconvenient to; removeornassemble the: component sections on the machine.

Also composite masksofteniare unstable in construction and invariably the componentmaskling sections. are held together: by exposed, unsightly fastening devices reducing, the;attractiveness and salabilityiofthe machine.

component'portions thereof,.are ,convenientlyxdisplaceable ,an'd/or removable togain access to certainmechanisms normally covered thereby.

,It is also an object of th invention to, provide an assembled mask which, although qnicklyvand conveniently assembled upon 1 the machine, will notrattle. l 1 i wAdditional ,cbjects ,and features of the novel maskstructure will becomeapparentfirom the drawing, particularly when the drawing is read in-thelight of the description and, the appended claims. M i o V ,Theiinventionis shown as it=may be {applied to the carriage ofa typewriting machine, but it shouidbeunderstood that the invention is applicable to anyothenportion orportionsof such of. p

In the accompanying drawing; Figure 1 is ,a rear perspective view invention appliedthereto, o o a Figure 2 is a fractional rear ,view of. the right end ,of: thecarriage seen in Figural, W i Figure 3 .isaright, end view of ,thecarriageincluding fractional l-portions of ,thegcomposite a k, a i f 1 oFigur e shows a left end view of the carriage withian endcoverthereon. v I i Figure 5 is a sectional front perspective view machines, particularly also tomain bodies thereofar pewritercarriage having the composite gmaskpf the shotwirigv an, tnterioGIfinQ ipi'nt between two maskinesections,

ens hereinbefore l-pointed out,f.the invention is shown applied ltoia typewriter-carriage, This carriage may comprise ,a mechanism-supporting frame I I lhayi ng upright,topposite carriage end 6 plates ,l 2 connected to the opposite ends, of a carriage rail or hard-3, See ,Figure ,3. The rail L3,, and consequentlythe carriage frame H, is guided in :a, conventional manner for letter-feed,- ing. and return movements .upon' a trackway I 4 com l'isinga part ofthemain framework of the machine, A platen 45, together .withits rotating knobs L6,,is,preferably; i emovably,.mounted on thepcanirageframe. ,Thecarriagefend plates 'l2,

for'this, purposevmay he notched asiatj, l I to provide mounting seats, for ,thep1aten. 9 The, platen may be removably,retainedinsaid.seatsiby means dated Septemberf5,..l939. l

The composite ,maskiorj the carriage comprises two oppositelyfldisposed side .covers or masking members [8 .and, an, intermediate masking memberor shroudlljl. Thesespacedmembers 118 have disclosed intthe patenttoII-Ie'lmond No. 2,172,008,

inwardly-extending top and rear flangesZZ and 2 3, re,speci'liv'ely, and constitute therewith narrow housings 'flan'kingthe carriage ,end plates"! 2 and suchimec'hanismas may be supported in adjacencythereto. "Each of thefside covers 18 is re- ,3 0 movablylseatable on thefframeends llandto this end theyaretat their inner sides "provided with brackets? having "inwardly extending fo'rkedfront andrearears25 andL2B,respectively. These forked earsfitoverfront and rear pins 21 and 218, respectively, the pins being carried by laterally projecting. lugs 31 on the end plates-l2 ofthecarriage. *"Theyiorkedears25526 and the 6 associated pins 1521, 28. I are so disposed thatthe sideicovers 18 may be swung toward 01"13.W3;Y from each other, to andxfrommasking position. l-nlso,

by reason of ithe forked ears,the covers 18 are readily attachablefor detachable from chine. The-framedugs?! arerso-jlocated-as to the macooperatewiththe forkedears 25 and-26 to locate the masking members 18 in *a fore-and-aftdirection on the carriage.

consist of a rear *wall "fl -merging 1 into-a forwardly extendingtop wal1 33, 1 f The spaced, masking ,members or covers '18 ,andjthe intermediate shroud haverespectively inwardly-reaching rims 34, 35 facing each other so"as lto "provide sub-x stantial abutting surfaces. Onfthe opposite ends of the intermediatejmeniberi'Zij near the bottom of the rear walllflgtherims 35ers extended fora rearwardly inclined camming ear 43.

wardly to form open pivot seats 36 normally resting on pivot studs or pins 31. These pins extend toward each other from the rear portions of the side covers l8, each pin being preferably supported on an ear 38 bent from one of the forked ears 26. From this it will be seen that the shroud 2| is pivotally displaceable about the said pivot studs 31, to and from masking position; or may be, if desired, entirely removed fromithe machine. Means are provided whereby in moving the shroud 2| to masking position, the covers or members I8 become firmly interlocked with the shroud in the direction in which the covers are moved from the carriage unless it is first moved rearwardly about the pivot studs 31.

To insure against accidental dislodgement of the mask assembly from the carriage, each car-' cannot be dislodged from-the pivot pins 21, 28,

I :as long as the shroud 2| is interlocked with the 1 side covers.

spaced. More specifically, each of the side covers |3 has, near its upper rear portion, a, .groove-' forming protuberance or ear 4| into which one of the inwardly extending rims 35 of the shroud When it is desired to remove either one or both of the side covers l8, the shroud 2| is first swung rearwardly and, if desired, removed. Either of 2| fits. It may besaid that the protuberances 4| and the rims 35 fitting therein constitute tongue-;-

and-groove joints. The ears 4| are so disposed and formed that the shroud 2| is movable to and from masking position. In some cases, it may be desirable to provide a tongue-and-groove in:- terlock along the entire adjoining edges of the composite masking members I8 and 2|.

Themeans by which the composite mask is held assembled upon the carriage will now be described. Upon each carriage end plate I2 is pivoted a rearwardly extending arm 42 having Strong springs 44 which areanchored on the end plates I? of the carriage, draw the arms downwardly. The ears 43 overlie tongues 45 reaching forwardly and upwardly from the shroud rims 35, and act thereupon to urge the shroud 2| forwardly as well asdownwardly. The result is that the shroud is seated and forced firmly onto the pins ,31 of the side covers l8 and against the bottom of the grooves in the'ears 4|, wherefore in turn the side covers are firmly seated on the pins,

' pivot studs 31. Stop lugs48 on the arms 42 are engageable with frame-projections 5| to limit downward movement of the arms when the tongues 45 clear the ears 43. As seen in Figures 1 and 3, the lugs 48 normally stand off the projections 5| so that normally the ears 43 bear effectively on the tongues 45. The front edges of the tongues 45 are so formed as to be capable of forcing the arms 42 upwardly when the shroud 2| is swung to masking position. As the shroud 2| nears masking position, the tongues pass in front of the ears 43. and draw the shroud forwardly and downwardly.

In the absence of an intermediate front masking member-,it is desirable to steady the front ends of the side covers I8. To this end, a rubber collar 52 may be interposed between each frame end l2 and adjacent side cover I8 while screws 53 passing through the covers and the collars may hold the side covers onto the frame ends |2.

In its ,masking position, the shroud 2| is blocked against upward movement by ledges 51 underlying the protuberances 4|, see Figures 3 the side covers, after loosening the screw 53, may then be swung outwardlyfree of the pin 54. The ears 25 and 25 being provided with open seats, allow then the removal of the outwardly swung cover from the machine.

In the aforementioned patent to Helmond No. 2,172,008, draw bolts 6'! are provided which form part of a platen lock-down device. Corresponding draw bolts are numbered 56, in the present drawing, and protrude normally from the op posite carriage ends |2 through clearance holes provided in the side covers I8. It will beobserved that the draw bolts remain on the carriage and that the side covers I8 are swung into position over them.

Figure 4 illustrates a slightly modified structure whereby a side cover |8 may be placed upon the carriage. ear 25 and the pin 21 have been omitted,- and the side cover is located on the carriage atits lower front by means of a pin 58 which projects from the carriage rail l3 into the side cover l8.

The carriage is shown to embody a paper table 6| which may be hingedly displaced for gaining access to adjustable margin stops 62.

While the form of the structure herein described is admirably adapted to fulfill the objects stated, it is to be understood that it is not intended to confine the invention to the form of embodiment herein described; for the invention obviously may take many forms, all comingwithin the purposes and scope of the present im-' provements.

What I claim is: 1. In a typewriting machine, a mechanismsupporting frame, two oppositely disposed masking members on said frame, an intermediate shrouding member, means for seating said intermediate shrouding member swingably for movement toward and away from said frame, to and from a shrouding position, said "seatingmeans being adapted to allow'readyremoval of the intermediate shrouding memberfand interfitting means adapted to lock said oppositely disposed masking members firmly to said intermediate member when the latter is swung to its shrouding position.

-2. In a typewriting machine, a mechanismsupporting frame, two oppositely disposed spaced masking members for said frame, means for removably and swingably seating said members in definitely spaced relation onsaid frame, an intermediate shroud, and means on said members and said shroud fitting each other in a manner so that said members and said shroud arenormally interlocked in the direction in which the members are spaced, and so that the shroud is removable from said members.

The previously-described forked ing position.

a-eeeeroe =3. In'atypewriting machine amechanlsm-supvporting frame, two oppositely disposed masking members for said frame, .means for removably and swingably seating said masking members in spaced relation :on the frame, an intermediate masking member, means rendering=said'in termediate member swingable to and from its, masking position, andmeans adapted to lock said oppositely disposed members firmly to said intermediate masking member when the latter is swung to its masking position. I

4. In a typewriting machine, a mechanism-covering mask comprising, two substantially parallelly spaced masking members, and an intermediate masking member, means adapting at least said intermediate member for swinging movement to and from a masking position, interfit ting means adapted to lock said spaced members to said intermediate member when the latter is swung to its masking position, and means adapted to holdsaid intermediate member resiliently in masking position to maintain thereby afirm interlock at said interfitting means.

5. In a typewriting machine, two oppositely disposed, mechanism masking members, an intermediate shroud, means seating said shroud swingably for movement from and to a shrouding position, about an axis extending intermediate said masking members, said seating means comprising open pivoting seats rendering said shroud quickly placeable on or removable from the machine, interfitting means adapted to lock said oppositely disposed members to said shroud when the latter is swung to shrouding position, and means blocking said shroud against removal, except when said shroud is swung from shroud- 6. In a typewriting machine, a mechanism supporting frame, two oppositely disposed spaced masking members for said frame, means rendering said members seatable on said. frame, an intermediate shroud adapted to be placed on said members, means on said shroud and said members interlocking the members with the shroud in the direction in which the members are spaced,

resilient means associated with the frame for. forcing said shroud on said spaced members,

said shroud being so placeable on said members, and said rendering means being so arranged with i respect to said forcing means, as to enable said forcing means to exert normally a resilient seating force on said spaced members, and cooperative means on said frame and said members adapted to anchor said members unremovably to said frameas long as the members are interlocked with said shroud.

, 7. A mechanism-encasing composite mask for a typewriting machine carriage, comprising, ope posite carriage end cover provided with shoulders extending toward each other, and an inter mediate shrouding member, said intermediate shrouding member and said shoulders having tongue and groove formations fitting each other so as to lock said end covers laterally to said intermediate shrouding member and so as to render saidshroudingmember removable from said covers, and means includingaleverage device to force said tongue and groove formations into firmly interlocked relation.

8, In a typewriting machine, a mechanismencasing composite mask, comprising, oppositely disposed spaced walls provided with shoulders extending toward each other, and an intermediate shrouding member, said intermediate member andsaid shoulders having tongue and groove formationsnttingieachother soasito interlock 'safid" spaced walls firmly withasaid intermediate member in the directionlin which saidiwalls aretspaoed and so as to render said shrouding member: re-

- movable ffrom said' walls,xandleveremeans to, force-saidltongue and groove 'formati'ons'iinto firmly interlockedirelation. I I

9. In a typewriting machine, a composite mask comprising two spaced and an intermediate masking member, open pivot means for said intermediate masking member, rendering it swingable to and from masking position and also removable from the machine, said intermediate member, when in masking position, locking said spaced members to the intermediate masking member in the direction in which the spaced members are spaced, and resilient means to urge said intermediate member to masking position after par- 'tially moving it thereto, said last means being devised to allow said intermediate member to be freely removed from the machine after being swung frommasking position.

10. In a typewriting machine, a mechanismsupporting frame, a compositemask for said frame, comprising a plurality of masking members, means rendering fewer than all said members seatable against said frame, means rendering the remainder of said members seatable against said fewer of saidmembers in a manner so that the latter are adapted to be seated and held firmly against said frame by forcing and holding theremainder of said members seated against saidifewer of said members, and means associated with the frame andsaid remainder of I said members for forcing and holding said remainder of said members seated against said few I er members. I

11. In a typewriting machine, a mechanism supporting frame, a composite mask for said frame comprising a plurality of masking members, means rendering fewer than all said members seatable against said frame, meansrender firmly seated and held against said frame by ing the remainder of said members seatable against said fewer of said members in a manner so that the latter are adapted to be seatedand held firmly against said frame by forcing and holding the remainder of said members seated against said fewer of said members, and means associated with the frame and said remainder of said members, said last meansincluding a resilient element for forcing and holding said remainder of said members seated against said fewer of said members.

12. In a typewriting machine, a mechanismsupporting frame, a composite mask for said frame, comprising two, spaced and an intermediate masking member, means rendering said spaced members seatable against saidframe, means rendering said intermediate member seatable against said spaced members in a manner so that the spaced members are adapted to be forcing and holding. said intermediate member seated against said spaced members, and means associated with the frame and said remainder of said'members for forcing and holding said intermediate member seated against said spaced 3 members.

13. In a typewriting machine, a mechanismsupporting frame, two spaced masking members i for said frame, means for seating said members spaced members rendering the intermediate mem- I ber removably seatable against said spaced members, and including means to interlock the intermediate member with said spaced members in the direction in which the latter are spaced, said intermediate member being 'so seatable against the spaced members that the latter are adapted to be seated and held firmly against said frame,

by forcing and holding said intermediate member firmly seated against said spaced member, and means associated with the frame and said remainder of said members for forcing and holding saidintermediate member firmly seated against said spaced member.

. WILLIAM F. HELMOND. 

